In its 15th year, the honor recognizes those who -- in the face of a global economic slowdown, austerity measures and other challenges -- have embraced change to create change. And many of them are HuffPost Impact bloggers!

Vicki Escarra of Feeding America tackles hunger issues as child homelessness, among other problems, increases. And Ben Rattray from Change.org has proven how technology is one of our greatest tools in mobilizing around a cause.

Read in the slideshow below about these notable nonprofit leaders who also share their thoughts as bloggers on HuffPost. Then, check out the full list at The NonProfit Times.

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The NonProfit Times Power & Influence List

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Ben Rattray is many things -- but complacent isn't one of them. The founder of Change.org and HuffPost blogger started his online activism site to take action after his brother was bullied when he came out as gay. Now, Rattray, one of TIME's 100 Most Influential People of 2012, has seen his site create change across the globe -- from petitioning for Saudi women's right to drive to pushing for a moment of silence in London for slain Olympians.

When Bill Gates coughs up some cash, he lays out in plain language just exactly "Why our foundation invests in India" -- for instance. His commitment to transparency and causes he believes him earned him an indisputable spot in The Nonprofit Times' ranking. This year alone, the co-chair of the Bill and Melinda Gates Foundation and HuffPost blogger raised funds and awareness for equal access to education and helped chart a course to end malaria. In addition, he and Melinda recently increased their commitment to family planning by pledging another $560 million.

Ray Chambers, UN Special Envoy for Malaria and HuffPost blogger, makes an impact all the way from Newark to Nairobi. His efforts include helping at-risk youth in New Jersey and working to tackle global health crises, among other initiatives. He retired as Chairman of Wesray Capital Corp to devote his time to giving back.

Brian Gallagher, President and CEO of United Way, makes sure his stance is known. The HuffPost blogger has stood out as a strong voice on issues ranging from charitable deductions in the federal tax code to education reform. Professionally, Gallagher has pushed United Way affiliates to strive for increased community impact, as well as higher accountability and transparency standards.

There's hardly a hunger initiative that's not associated with Feeding America these days. Vicki B. Escarra, President and CEO of the national hunger nonprofit, has led the organization in expanding service from 25 million people to 37 million nationwide. Escarra has made The NonProfit Times' Power and Influence Top 50 for the past three years.